Please use this tag only for general Mindstorms questions and compatibility. If the question refers specifically to the EV3, NXT, or RCX, then use those tags instead.

learn more… | top users | synonyms

1
vote
2answers
331 views

Lego Mindstorms EV3 crashes on OS X El Capitan

I get the following problem details, can anyone help me? Process: MindstormsEV3 [595] Path: /Applications/LEGO MINDSTORMS EV3 Home ...
1
vote
1answer
126 views

Clicking Brick Syndrome after using Raspberry Pi

I have a Mindstorms NXT brick, and when switching it on recently, it just started clicking. I have tried many different ways to fix it, but nothing has worked. I've done a soft reset, hard reset ...
3
votes
2answers
2k views

Mindstorms EV3 PC application won't load

Installed Mindstorms EV3 application on MS Windows 7 Home Premium v6.1 (Build 7601: Service Pack 1) and I keep getting the same error message when launching. A white window pops up with the ...
4
votes
5answers
2k views

Will the Mindstorms EV3 software run on OS X El Capitan?

El Capitan was released a few days ago, and I want to upgrade. Will there be issues with the software, or will it run nicely on El Capitan? My Mac: Retina MacBook Pro 13", Early 2015
6
votes
2answers
2k views

How to control a RCX from a Mindstorms NXT

I have both an RCX and an NXT. I would like to control the RCX brick from the NXT (and possibly communicate back to to the NXT from the RCX). I would like to avoid purchasing the Mindsensors RCX to ...
1
vote
2answers
662 views

How to install NXT Firmware 1.28?

Lego is giving 1.31 from their website but I need 1.28, how can I install it?
6
votes
2answers
18k views

Lego Mindstorms RCX RIS 2.0 IR tower Windows 7 / Windows XP driver

So I've recently dug up my old Lego Mindstorms RIS 2.0 (RCX) and have spent the past few days trying to install it into my Windows 7 laptop. It worked fine, except it could not find the correct ...
3
votes
1answer
40 views

Programming/running a NXT brick with a dead screen, via PC?

I have a NXT set and the control brick has a dead screen. I tried fixing it (resoldered caps, ribbon rub, etc) to no avail. It's dead. Is there any software that will allow me to program and execute ...
1
vote
1answer
53 views

Direct/system command for reading the display buffer of EV3 bricks?

I recall being able to read in the display buffer of NXT 2.0 bricks over Bluetooth/USB by issuing Read IO Map system commands. I've looked through the bytecodes and communication documentation for the ...
5
votes
2answers
1k views

Programming Mindstorms on a chromebook

I know there is no official way to program NXT/EV3 on a Chromebook. But a Chromebook can have Ubuntu installed via Crouton in developer mode. So, is there a relatively painless way to program ...
4
votes
1answer
194 views

Lego 3804, Mindstorms Robotics Invention System 2.0 on Windows 10

I gave my grandson (11 years old) the LEGO 3804 Mindstorms Robotics Invention System 2.0. He built a couple things and when he tried to install software to program what he built, the computer would ...
6
votes
1answer
2k views

Virtual LEGO / Technics / Mindstorms simulation environments

I know that there are quite a few LEGO CADs floating around, but are there any physically correct simulation environments for models built with LEGO / Technic / Mindstorms parts, that would, for ...
1
vote
0answers
29 views

Mindstorm RIS 2.0 installation on Windows 10 [duplicate]

I recently bought a RIS 2.0 but was unable to install the program onto my laptop running Windows 10 (now). I tried it on my office computer running Windows 7 and the installation was successful. The ...
12
votes
3answers
10k views

NXT screen either flickering or blank, what do I do?

The screen on my LEGO MINDSTORMS NXT brick has just stopped working. It is either flickering, or blank. I have tried turning it on and off, installed fresh batteries, and I can even hear the selection ...
0
votes
0answers
51 views

Why is Bluetooth is so temperamental?

I had a program that would use the Ultrasonic sensor to detect when it was 6 inches from another robot and then would stop send a bluetooth message to the other and would send the other one off. Like ...
0
votes
0answers
31 views

How to receive response from direct_command_reply from EV3 using Python?

I've established and tested a Bluetooth connection (by playing a tone) between EV3 and Mac running Yosemite with Python 2.7.11. I used file write as in bt.write(tone) in Python to play the tone with ...
1
vote
1answer
73 views

EV3 ide flickering

I'm using the Mindstorms IDE for EV3 on OSX. Everytime I'm moving the cursor the screen starts to flicker. See https://www.youtube.com/watch?v=q3JkonowmD0&feature=youtu.be . Any ideas what's ...
13
votes
4answers
23k views

How can I wirelessly connect the NXT and an iOS device?

I've seen videos around YouTube (like this one for a car) that show an ability to control a Mindstorms set via iOS (either iPhone or iPod Touch). I am just getting started with Mindstorms, but find ...
2
votes
1answer
418 views

EV3 Error and VM Program Instruction Break

I'm making a program which is very complex and large but it does not contain any Arrays in it. Weird thing is, last night it worked fine but today when I downloaded the exactly same thing into the EV3 ...
7
votes
5answers
10k views

How to use Power Functions with Mindstorms EV3?

Having learned that Mindstorms EV3 doesn't work directly with Power Functions, Q: Can you use Power Functions motors with the EV3 programmable brick? A: No, the connector does not match. I ...
26
votes
6answers
9k views

What are the best options for building a LEGO RC car?

I would like to build a remote controlled car. And if someone already has a good solution for that I would be glad to try it. It's been a while since I had the time and material to build some LEGO ...
8
votes
1answer
642 views

Connecting to NXT Brick via Processing over Bluetooth

I am attempting to control my NXT model via the Processing programming language rather than the provided language based on LabView. When I can establish a connection over Bluetooth, this works rather ...
1
vote
2answers
2k views

EV3 parallel MyBlocks, but only one working

TL;DR = Is there any obvious reason why a MyBlock, added twice in parallel to a program, will only run one of them? In my EV3-G program, I have a MyBlock which uses the Proximity Heading to control ...
0
votes
0answers
41 views

Mindstorms brick has a dim display

The LCD display on my Mindstorms brick (microprocessor) is very dim. It is not just a low battery; I've plugged it into an AC adapter. Anybody encounter this problem? I will post a picture of the ...
2
votes
1answer
123 views

Using the NBR 1036 Barometer with the EV3

I just purchased the HiTechnic Barometer from LEGO, thinking the Block was available for the EV3. Theory says that I can use NXT Block in the EV3. Can anyone point me in the right direction?
0
votes
1answer
69 views

What is LEGO MINDSTORMS? [closed]

I have heard of LEGO MINDSTORMS, and wondered what it is for the longest time. What is it? What can you do with it?
3
votes
1answer
55 views

LabView Mindstorms - What does speed in seconds mean?

I'm trying to set a motor to spin exactly at 60rpm, and I'm using LabView for Lego Mindstorms. However, when reading the documentation for the move motor block, it says this: Power/Speed ...
2
votes
1answer
149 views

Differences between EV3 Gyro and Hitechnic Gyro

I understand that the Hitechnic Gyro was made for NXT but are there any advantages of using it over the normal lego gyro in EV3??
2
votes
1answer
422 views

Programming The Lego Mindstorms T-Rex from EV3 Laboratory

I bought the book The Lego Mindstorms EV3 Laboratory fron Daniele Benedettelli. I buid the T-Rex chapter 15 and when I tried to programming the T-Rex (chapter 16) I have a problem. I'm not able to ...
1
vote
0answers
43 views

Is there any way to find misplaced bricks in LEGO NXT Programming?

I am working on a Mindstorms NXT project. Due to annoying bug (cannot find terminal hotpoint thingy) I can't delete a specific block, and if I do so, part of the program will be cut off from the main ...
4
votes
1answer
107 views

What are the various LEGO motors that have been produced over the years?

RCX, NXT, WeDO, EV3, Technic etc. How many different motors have been released over the years??
2
votes
2answers
177 views

Lego EV3 - Get output device type, opOUTPUT_GET_TYPE

I would like to know what kind of motor (XL, L) is connected to EV3 output port (A|B|C|D). I need to use direct command: Instruction opOutput_Get_Type (LAYER, NO, *TYPE) Opcode ...
2
votes
3answers
918 views

The Mindstorms EV3 Software crashes on OS X Yosemite 10.10.3. What do I do?

It's crashing on startup which is really irritating. When debugged with terminal it says this: Unhandled Exception: System.UnauthorizedAccessException: Access to the path is denied. [ERROR] FATAL ...
2
votes
2answers
70 views

RCX 2.0 Firmware downloaded successfully but “Run” does nothing

I recently was able to install RIS 2.0 for the first time since I just got a 32bit Windows 7 machine, I got the IR tower to download the firmware to the RCX 2.0 and it showed exactly the same screens ...
2
votes
1answer
106 views

No response when controlling the Mindstorms EV3 brick over Bluetooth

I am trying to control the EV3 using direct commands over a Bluetooth connection. There are no issues pairing the brick with a PC or phone, and opening the serial connection works fine, but sending a ...
1
vote
0answers
68 views

After adding a MyBlock icon to the EV3 palette of MyBlock icons, how can the new icon be associated to an existing MyBlock?

After following the advice given in adding a MyBlock icon to the EV3 palette, can the icon be associated to an existing MyBlock? Something better than copy/paste the contents of the existing MyBlock ...
1
vote
0answers
49 views

What's the first block in MoveAbsolute for programming the T-Rex, in The LEGO MINDSTORMS EV3 Laboratory book? [duplicate]

On MoveAbsolute2 and 1 for The LEGO MINDSTORMS EV3 Laboratory book by Daniele Benedettelli, programming the T-Rex, I don't know what the first block is, can i please have help?
6
votes
1answer
3k views

Mindstorms 2.0 can't download to NXT brick with error 142023

Using Mindstorms education 2.0 on a Windows 7 computer I can't seem to get the program to see the NXT via USB or bluetooth dongle. When connected by USB nothing appears in the NXT window with device ...
5
votes
1answer
3k views

How do I update my NXT firmware using EV3 software

The new EV3 software tells me to update my firmware on the NXT. When I go to the tools menu and select update firmware it tells me the NXT brick can not support this function.
3
votes
3answers
894 views

Could I do datalogging in Mindstorms EV3 Home edition?

Apparently datalogging is an integrated part of the educational EV3 software. But I got the Home edition. Is there some module or thing I can use to get datalogging functionality in my Home edition? ...
3
votes
1answer
80 views

Can the rcx work without the infrared tower

I'm getting a rcx 1.0 or 1.5 and it's not coming with the tower. Can I still program it, using some sort of cable?
1
vote
2answers
90 views

Which program do I use to program my rcx 1.0 or 1.5

I am getting an RCX and I know it is ether a 1.0 or a 1.5. Which program do I use to program my RCX?
3
votes
0answers
27 views

Using Dexter WiFi Sensor with Robot C

My wife bought me a Mindstorms NXT system a few years ago and I bought a Dexter WiFi sensor (http://www.dexterindustries.com/manual/wifi/) for it, By the time I got a chance to work with it, I found ...
2
votes
1answer
191 views

LEGO Mindstorms NXT - NXC compiler for OS X

I need an IDE for LEGO Mindstorms on my Mac, but I only found a few for Linux and Windows but not for Mac. I found NeXT Tools, but the newest version isn't compatible with Yosemite. If I execute it, ...
1
vote
0answers
31 views

LEGO Mindstorms not downloading to brick properly

When I try to download a program to my Mindstorms brick, the download immediately completes, and the program is listed on the brick menus, but it will not run the program. Also when I open the memory ...
10
votes
4answers
4k views

How to make Mindstorms respond differently, depending on which sensor is triggered?

I am new to Mindstorms (but in my day job I am a programmer). I want to make my robot do one thing if the touch sensor on port 1 is pressed, and do something different if the touch sensor on port 2 ...
2
votes
1answer
195 views

EV3 turning in circles

New programmer feeling my way around. I set the most simple "steering block" to 25, the power to 50, and the number of motor rotations to 40 or 50. Then I let it run expecting the bot to go in a ...
2
votes
3answers
824 views

Programming NXT color sensor with NXC?

Currently I am working Lego robot that solves 2x2x2 Rubik's cube. I am programming Lego Mindstorms NXT 2.0 color sensor in BricxCC. I already have RGB data with the command ReadSensorColorRaw. I ...
1
vote
1answer
172 views

Can Mindstorms EV3 communicate using protocol 802.15.4?

My aim is to make the robot communicate using protocol 802.15.4 through a USB dongle 802.15.4 over 6LoWPAN. The robot has to be able to get information from TelosB. I wonder whether this possibility ...
1
vote
1answer
2k views

How can I use multiple switch options in Lego Mindstorms EV3 software?

What I see is just a simple if/then/else. What I am looking for is to be able to add multiple options, more than yes/no. I use a motor as a switcher, so I rotate it to some position and measure its ...